chore: bump bootstrap in /examples/mern-cdk-ci-cd/mern/client

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 4.6.0 to 5.0.0.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](twbs/bootstrap@v4.6.0...v5.0.0)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

examples/mern-cdk-ci-cd/mern/client/package.json

@@ -6,7 +6,7 @@
     "@testing-library/jest-dom": "^5.11.4",
     "@testing-library/react": "^11.1.0",
     "@testing-library/user-event": "^12.1.10",
-    "bootstrap": "^4.6.0",
+    "bootstrap": "^5.0.0",
     "cypress": "^9.2.0",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",